This GIS layer contains the shiptrack navigation lines collected aboard the RV UCONN during a 1984 geophysical cruise to west-central Long Island Sound. A boomer seismic system was used to collect the subbottom data.

Purpose:

The purpose is to disseminate a digital version of a regional map showing the distribution of sub-bottom seismic profiles (boomer) collected in eastern Long Island Sound aboard the UCONN during 1984. The seismic data collected along these ship tracks can be used to provide useful information about the framework geology in this region.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19840516

Ending_Date: 19840525

Currentness_Reference: publication date

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -73.303192

East_Bounding_Coordinate: -72.864601

North_Bounding_Coordinate: 41.239346

South_Bounding_Coordinate: 40.920067

Keywords:

Theme:

Theme_Keyword_Thesaurus: General

Theme_Keyword: U.S. Geological Survey

Theme_Keyword: USGS

Theme_Keyword: Coastal and Marine Geology Team

Theme_Keyword: Coastal and Marine Geology Program

Theme_Keyword: Woods Hole Field Center

Theme_Keyword: Connecticut Department of Environmental Protection

Theme_Keyword: ArcView

Theme_Keyword: arcview

Theme_Keyword: shapefile

Theme_Keyword: lines

Theme_Keyword: navigation

Theme_Keyword: geophysical data

Theme_Keyword: ship track

Theme_Keyword: boomer data

Theme_Keyword: UCONN

Theme_Keyword: 1984

Theme_Keyword: Geographic Information System

Theme_Keyword: GIS

Theme_Keyword: UCONN84-1

Theme_Keyword: polyline

Theme_Keyword: trackline

Theme_Keyword: ship's track

Place:

Place_Keyword_Thesaurus: General

Place_Keyword: Long Island Sound

Place_Keyword: Connecticut

Place_Keyword: New York

Access_Constraints: None

Use_Constraints:

The U.S. Geological Survey must be referenced as the originator of the dataset in any future products or research derived from these data.

Although this derived data set and its lineage dataset have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials.

Late Quaternary Stratigraphy and Depositional History of the Long Island Sound Basin: Connecticut and New York

Geospatial_Data_Presentation_Form: map

Series_Information:

Series_Name: Journal of Coastal Research

Issue_Identification: special issue # 11

Publication_Information:

Publication_Place: Fort Lauderdale, FL

Publisher: Coastal Education and Research Foundation

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

All attribute data were recorded by the chief scientist and entered and checked by the compilers in a consistent manner.

Logical_Consistency_Report:

No additional checks for topological consistency were performed on this data set.

Completeness_Report:

Complete information is provided for all navigation lines in the data set; lines are generated from navigation points spaced at 5 minute intervals (approx) and at course changes or line events (start/end). Continous navigation is not available.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

All navigation was done by Loran C. Typical Loran accuracy for LIS is about 100 m.

Quantitative_Horizontal_Positional_Accuracy_Assessment:

Horizontal_Positional_Accuracy_Value: 100

Horizontal_Positional_Accuracy_Explanation: Loran-C accuracy

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Ralph S. Lewis(comp.)

Originator: Nancy F. Neff(comp.)

Publication_Date: unknown

Title: Unpublished data from UCONN 84-1 geophysical cruise

Larger_Work_Citation:

Citation_Information:

Originator: Ralph S. Lewis

Originator: Mary DiGiacomo-Cohen

Publication_Date: 2000

Title:

A review of the Geological Framework of the Long Island Sound basin, with some observations relating to postglacial sedimentation

High-resolution seismic-reflection data were collected during field work conducted in west-central Long Island Sound during 1984. This data set is the navigation from that cruise.

Process_Step:

Process_Description:

Selected navigation points from the original onboard logs were hand plotted on charts with Loran overlays. These overlays were then registered and digitized (using a Calcomp 9100 table and PC Arc/Info) to create point coverages with CT state plane coordinates. Ungenerated point coordinates were used to generate a line coverage. Lines were edited where necessary (split at start/end) and attributes were added.

Navigation shape files were modified to remove the Arc/Info specific attributes and add the attribute field IMAGE. This field is used to store the relative path to the browse image of the associated seismic record for the line segment.

Although this derived data set and its lineage dataset have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: ArcView

Format_Version_Number: 3.2

Format_Specification: ESRI shapefile

Format_Information_Content:

The seven ArcView shapefiles (84_1navt.dbf, 84_1navt.shp, 84_1navt.shx, 84_1navt.avl, 84_1navt.sbn, 84_1navt.sbx, 84_1navt.prj) comprising the navigation line data for the UCONN 84-1 cruise in west-central Long Island Sound and an ASCII version of the metadata file.

The user must have a system with a DVD drive capable of reading an UDF standard DVD-R disk. To browse the information contained on this disk, the user must also have a current version of WWW browser available. The user must also have the software installed on their computer system capable to unzip the archived file.

Fees: none

Custom_Order_Process: None

Technical_Prerequisites:

The UCONN84-1 navigation overlay is available in an ArcView shapefile format. The user must have ESRI's ArcView 3.0 or greater software to read and process the data file. In lieu of Arcview, the user may utilize another GIS application package capable of importing the data.